Apple powermac g3 blue.white Manuales De Servicio
Troubleshooting
Symptom Charts/Video and Sound - 44
Screen is black, there
is no boot tone, and
drive does not
operate, but fan is
running and LED is lit
1 Check video cable/card connections. If using a VGA to
Macintosh adapter refer to “VGA-to-Macintosh Adapter”
earlier in this chapter.
2 Check jumper block configuration at J25. Make sure jumper
block is correct color for processor type installed (see
“Jumper Location J25” earlier in this chapter for more
information). Also make sure the metal jumper pins are in
the correct position in the block and the block is installed in
the correct direction.
3 Reset Cuda chip. (Refer to “The Cuda Chip” in this chapter
for instructions.)
4 Reset logic board. (Refer to “Resetting the Logic Board” in
this chapter for instructions.)
5 Reseat the video card.
6 Reseat the SDRAM DIMMs.
7 Reseat processor module.
8 Remove all SDRAM DIMMs and try replacing them one at a
time to test. Replace any bad DIMMs.